Improvement in machines for sewing boots and shoes



2 Sheets-Sheet 1.

C. 0. CROSBY.

Patentedmarch5,1e72.

g5/wsse@ Y Y 2 Sheets--Sheetj 'l (3.0. CROSBY.

Improvement in |\'I`achinesl for Sewing Boots and Shoes..

N0.12'4338,- Patented Mreh 5,187.2.

xirnn Sra'rns PATENT CFrrcE. i

OHAUNCEY O. CROSBY, OF MILFORD, ASSIGNOR TO THE CROSBY WELTED-AND-TURNED-SOLE SEWING-MACHINE COMPANY, OF NEW HAVEN, CT.

IMPROVEMENT IN MACHINES FQR SEWING BOOTS AND SHOES.

Specification forming part of Letters Patent No. 124,338, dated March 5,1872.

To all whom it may concern:

Be it known that I, Cr-IAUNCEY O. CROSBY, of Milford, in the count-y ofNew Haven and State of Connecticut, have invented a new Improvement inMachine for Sewing Boots and Shoes; and I do hereby declare thefollowing', when taken in connection with the accompanyin g drawing andthe letters of reference marked thereon, to be a full, clear, and exactdescription of the same, and which said drawing constitutes part ot'this speciiication, and represents, in-

Figure 1, a side view of that part of the machine to which the inventionpartially relates. Fig. 2, a top view of the shuttle-race; Fig. 3, afront view oi' the sanne; Fig. 4, a transverse central section; Fig. 5,a front view ot' the work-plate detached.

The last four views are full size.

This invention relates to an improvement in machines for stitching thesoles of welted work, and as an auxiliary to the machine in applicationA, iiled in even date herewith 5 the object being the employment ot' ashuttle carrying a second thread to make what is known as the"1ock-stiteh,7 and the invention consists in the peculiar construction.of what may be termed the work-plate, whereby I a-m enabled to employ ashuttle or lock stitch in welted work.

A is the shuttle-race 5 B B,- the shuttle-carrier; C, the needle-bar; c,the needle D, the part which I term the work-plate, shown detached inFig. 5, and is formed to be secured upon the under side oftheshuttleraee, as seen in Fig. 4. From the needle-hole d downward thework-plate is curved back, as seen in Fig. 4, and also eurvedupon itsface or vertical plane, as seen in Figs. 3 and 5. Thus the work, passingover the work-plate, will bear, as it were, upon but a single point, andthat point in the immediate vicinity of the path ot' the needle throughthe plate. On the said plate a projection, b, is formed to set into thegroove on the sole ot' the shoe, as seen 1n Fig. l, E representing asection of the shoe. F is a guard, which extends down in front of thework-plate, as seen in Figs. l, 2, and 3, and sits upon the shoe abovethe edge of the sole and welt, as seen in Fig. 1, the needle enteringthe welt above the said guard. This guard, while it prevents the needlefrom coming in contact with the upper, also serves as a guide in holdingthe shoe, it being desirable that the path of the needle should bethrough the welt and upper, as close to the upper as possible, andthrough the groove upon the outside ot the sole 5 and this is insured bythe guard F upon the upper andthe projection b in the groove upon theoutside of the sole. Therefore, while on the ball and around the toe,the sole would stand nearly perpendicular, or at right angles to thepath ofthe needle, as it approaches the shank the shoe turns, incliningthe sole, as denoted in Fig. y1. Hence the necessity ot' curving orinelining the work-plate downward from the needle-hole, and thecurvature which is given to the sole at the shank portion also requiresthat a transverse curvature be given to this plate, as denoted in Fig.5.

By this construction oi' the work-plate the shoe may be turned in an)Tdirection to give the required inclination to the sole, in order thatthe needle may pass through the welt and sole in the path, as beforedescribed.

Claims.

needle and the guide F, constructed and arranged substantially asdescribed.

" C. O. CROSBY.

Witnesses:

A. J. TIBBrrs, J oHN E. EARLE.

